Tank pump



Feb. 13, 1923.

H. F. BENSON.`

TANK PUMP.

FILED JAN.28.1921.

| I W .3 2 I0 J M w 3%@16 I 4 w ,.w /M III N @0M I.. w @M fO OMV L@ A. f/ 5 @l 5 3 7 3 w. 2. I w I i @fm A d. 7 Z. d, .g n W 0W Z W1 F 4 F 3 0/ -l 7 @d 7 o ,a w I I I I I u- I MMMWM @mma m n MN 6 of Y m nm 4 \M 2 Patented Feb.' 13, 1923. I'

UNETED STATES T' GFFICE,

HARRY F. BENSON, 0F HOLYOKE, MASSACHUSETTS,'ASSIGNOR T0 WORTI'IINGTON PUMP AND MACHINERY CORPORATION, OF NEW YORK, N. yY., A CORPORATION OF vIaGINIa TANK PUMP.

Application filed January 28', 1921. Serial No. 440,606.

To all whom it may concern.:

Be it known that I, HARRY F. BENSON, a y citizen of the `United States, residing at Holyoke, county of Hampden, and State of Massachusetts, have invented certain new and useful Improvements in Tank Pumps,

desired to dispense the stored fluid in rela-v tively small quantities at varying intervals such, for instance, as in commercially 4handling gasolene and thev like.

A particularobject 1s to provide a pump of this type in which a series of impellers produced from sheet metal are assembled on a single shaft and are enclosed by a cylindrical ump barrel member receiving conversion or difusionyanes also-formed of sheet metal, thus providing a construction which, in addition to being simple, is inexpensive to manufacture by reason of" lowA production cost of the component parts and ease of assembly.

A further feature of importance, especially in its combination with the' liquid seal, consists in the use of a leakage space or chamber between the liquid seal and thev pressure line which returns all leakage of fluid or vapors to the storage tank, effectively precluding the existenceof any pressure against the liquid seal packing. A further feature of the invention resides in combining the pump barrel, discharge and thrust .bearing member taking the pump load, whereby the total length of .the connection between the ldischarge head or T and the thrust bearing member may be varied to suit conditions. Y

v In the drawings:

Figure 1 is a vertical central section 'showing a pump and storage tank embody'- ing the present invention. I

Figure 2 is an enlarged vertical central section of the lower end of the pump barrel. Figure 3 is a horizontal section on the line 3-3 of Figure 2.

Figure 4 is a horizontal section on the line 4 4 of'Figure 2.`

Referring to the drawings: A

v The pump, as herein shown, is in connection with a storage tank A of the type usually placed under ground. This tank A carries the saddle flange 1 into which one end of a cylindrical casing 2 is fitted, the other end of said casing being received by an aperture in the foundation plate 3 located on the floor of the pit B directly above the saddle flange 1. 'The' foundation plate 3 forms the bed for the discharge head C above which is'mounted the driving means D which is connected with the pump G located within the storage tank A.

The dischargehead C is a substantially cylindrical casting having a flanged base r to recelve a pipe o foi conveylng away the fluid l discharged b v the pump.v The elbow 4 has a vertically disposed bearing 6 concentric with the cylindrical casting and with the ldownwardly directed-opening of said elbow;

4 The vupper end of the cylindrical'casting receives the lower end of a spacing nipple 7, the upper end of which carries the driving head D' comprising an annular thrust bearing chamber having an inner wall 9 and an outer wall 10 forming also alubricant reservoir. The outer wall 10 is flanged as at 11 to receive the supporting legs of a drivingmotor 13, said legs being indicated at 12 and resting on the flange. A top cover plate 14 also rests on the flange 11 and closes the upper side of the oil or lubricant chamber. The shaft 15 of the motor has fixed thereto asleeve 17 which is also fixed to the'upper end of the vertical pump shaft 16. The sleeve 17 has the skirt 18 providedwith the shoulder 20, said skirt of said races 19 and 21 being in a vertical` p-lane.

The arrangement vof the skirt. 18 of the shaft sleeve 17 telescoping over the inner wall 10 and extending below the surface of the lubricant in thev annular reservoir 8 provides, in addition to a lubricating chamber for the thrust bearing, a liquid seal for the 4p-ump casing.

upper end of the pump casing as will be hereinafter described and which effective-ly prevents the escape of any vapors from the The shaft 16 extends downwardly through the bearing 6 and also through the bearing 22formed in thedrop pipe coupling member 23 connecting the drop pipe sections 24 and 25, the said coupling member 23 being webbed as shown to permit upward passage of the fluid pumped.

, On the lower end of the drop pipe section 25 is a coupling member 26 having the bearing 27 receiving the shaft 16 and connecting with the coupling member through Webs 28. This coupling member 26 receives the upper e-nd of the pump barrel 29 which is of cylindrical form. The length of the shaft 16 which extends through this pump barrel 29 is .reduced in size to provide. an upper shoulder against which there is seated an impeller 31 which is keyed to the said 'shaft as at 30.

This impeller is produced 'from a sheet metal disc radially slitted to form axial flow vanes -or blades 32 bent downwardly with respect to the upper face or discharge side of the impeller. After this impeller 31 has been properly seated against the shoulder on the shaft 16 the guide vane member 33 is slipped into the pump barrel 29 and consists of a cylindrical sleeve having radially directed ide vanes 34 cut out from the said sleeve inthe form of tongues bent inwardly Ain a radial direction with respect to the axis of the sha-ft 16.- These tongues or vanes 34 are of less Width than the sleeve. The said guide vane members 33 are also of sheet meta-l and the cylindrical sleeve arrangement provides for properly spacing the guide vanes between the impellers, the uppermost guide vane resting against the lower end of the coupling member 26.

The impellers are all indicated as 31 and are assembled to the lower end of the shaft 16 in the same manner as that previously described except that, in order to properly space the impellers along the shaft, spacing j due to the fact that there is practically no thimbles 35 are slipped onto the shaft between the impellers. Between adjacent iinpellers guide vane members 33 are slipped into the pump barrel land the final guide vane member is held in the barrel by the threaded portion of the supporting coup-ling 38 screwed into the' end of the barrel 29 and having webs 37 which carry the bearing member 36 receiving the bushing 39 through which the last Aspacing thimble 35 projects. This thilnble is provided with a. threaded portion 4() screwed on the threaded end 41 of the shaft 16 and locked against b-acking off by a jam nutl 42. Legs 43 on the supporting coupling 38 ensure t-he proper spacing of the lower end of the pump barrel from the bottom of the storage tank A.

It is to be noted that the only weight which has to be sup-ported against downward thrust from the ldriving head the shaft 16 carrying the impellers 31 and their spacing thimbles 35, the remainder of the weight of the pump barrel being supported bythe discharge casting by reason of the fact that the guide vanes are slipped into the pump barrel shell in the manner described.

In operation, the motor 13 driving the vertical shaft 16 rotates the impellers 31 the-reby drawing fluid from the storage tank A in at the lower end of the pump barrel 29 and carrying it upwardly through the drop pipe and discharging it through the outlet pipe 5. The elbow 4, while cast integral with the discharge head casting C, nevertheless, is spaced from the cylindrical wall vthereof -in such a manner that the casing 2, discharge vhead casting C and nipple 7 form a returnv conduit directly to the storage tank A, the upper end of said conduit being liquid sealed by the'lubricant in the thrust bearing chamber, therefore, any leakage past the bearing 6 is directly returned to the storage tank and, by reason of :the liquid seal, there is ni opportunity for the escape of vapors. This construction makes the pump one which is admirably adapted to the handling of volatile liquids.`

The separation of thev thrust bearing chamber D from the discharge head C by inter- 115 posingithe nipple 7 therebetween permits the placing of the driving means at any desired height, dependent on conditions, by simply' changing the length of the nipple 7 and, of course,'providing the required length of vertical shaft 16.

With the use `of this type of pump in connection with a storage system for volatilev liquids, such liquids may be readily handledsuction head. Furthermore, if a valve is placed in the discharge head the design of the pump is such that it has a predetermined maximum or closed valve discharge pressure A which does notl increase' even though the 130 said shaft.

pump is permitted to operate with the discharge valve closed. Also, this construction provides a -pnmp in which no suction valve isused at thefoot of the pump and consequently the pump barrel drains when not in use with the result that there is no pressure in the pump barrel when the pump is not in operation.

I claim:

l. The combination with a storage tank, of a pump comprising a hollow driving head closed at one end, a casing pipe connecting the openend of thedriving head with said tank, and a pumping means within said tank and having a. delivery passage enclosed Within but independent of said casing pipe.

2. The combination with a storage tank, of a pumpcomprising a hollow driving head having a liquid seal .at one end, a ,casing pipe connecting the other endwith .said tank, and a'pumpingbarrel within said tankV and" havingzgagjdelivery passage enclosed within but independent'of said casing-pipe.

3. The combination with a storage tank, of a pump comprising a thrust bearing head mounting al driving member,a` hollow discharge castin having closed connection with said vhead and including a'discharge elbow,

a casing pipe connected at one end with said Y casting and at the other with said tank, and pumping means indsaid tank connected with said discharge elbow and drive omv the driving member f vou'nted on the' ing head.

4. The combinationw'ithf al storage tank,, of al pump comprising a thrust bearing head having a liquid seal and mounting a driving ."member, a hollow discharge casting connectv'ed with and closed by said thrust bearing head and including a discharge elbow, ya casing pipe connected at one end with said casting and at the other with said tank to form a leakage return to the'tank, and pumping means in said tank and discharging through said elbow and driven from the driving member mounted on said thrust bearing head. I

5. The combination with a storage tank, of a pump comprising a thrustfbearing head formed with spaced annular -walls forming aA lubricant reservoir therebetween, driving means surmounting said headand having a shaft extending through the head and surrounded by the inner wall ofthe lubricantl reservoir, a sleeve carried by said shaft and extended below the lubricant in said head to form a liquid seal, a discharge casting having' closed connection with said head and tankto form a return conduit'to ythe tank,- and a pump barrel having a deliverypassage in said closed connection and driven by 6. In a pump, a thrust bearing head mounting apdriving member, a discharge casting', and a'removabl connection between the two whereby the space between the same may be varied by substitution of different length connections.

7. A pump barrel comprising a cylindrical shell, va discharge pipe coupling member at and confined between said coupling and.

foot members and having radially extending tongues cut therefrom and bent inwardly Abetween each pair of {limpelilers to form guide vanes. Y

8. A pump barrel comprising a cylindrical shell, a discharge pipe coupling member at one end of Said shell, a foot member at the other end, an axially extending shaft,

impellers in keyed relation with and spaced alongsaid shaft, and sheet metal cylindrical sleeves gslip'ped into said casing and confined between said coupling and foot membersand having-radially extending tongues cut therefrom-and bent inwardly between each air.. of impellers to*v form guide vanes.

@9i 'fj pump barrel compris-inga cylindrical shell, `radischarge pi e coupling member at one end `of .sai'dfslielllaffoot member at the .other end, an'axially extending shaft, im-

pellers in keyed relation with and spaced along said shaft and each comprisin'ga sheet metal disc radially slitted to provide blades,

'id blades being bent downwardly on one iside of the disc to impart the proper pitch,

a spacing thimble on said shaft between each pair of impellers, and means retaining said impellers and spacing members against movement longitudinally ofsaid shaft.

10. A pump barrel comprising a cylinl drical shell, a discharge pipe coupling memi ber at one end of said shell, a foot member at the other, bearings carried by said members, an shaft mounted in said bearings axially of said shell, impellers in keyed re# lation with said shaft and spaced therealong and each comprising a sheet metal disc radially slitted to provide blades, said bladesbeing bent downwardly on one side of the disc to impart the proper pitch, a spacing thimble between each pair'of impellers, and sheet metal cylindrical sleeves slipped into said casing and'confined between said coupling and foot members andreach having ltongues struck out from thegsame and bent radially inward between the respective yimpellers-to provide guide vanes. A

' 11. A pump barrelcomprising a cylindrical shell,` a discharge pipe coupling member at one end of said shell, a foot member at the other, bearings carried by said members, a shaft mounted in said bearings axially of Vsaid shell, impellers inkeyed pellers, and sheet metal cylindrical sleeves relation withn said lshaft and spaced therewith radially bent tongues forming spacingrv along and each comprising a sheet metal pieces and combined guide and conversion 10 disc radially slitted to provide blades, said vanes.

blades being bent downwardly on one-side In testimony whereof, I have hereunto set of the disc to impart the proper pitch, a my hand. spacing thi'mble between each pair of im- HARRY lF. BENSON. 

